Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review
Farzanfar D, Abumuamar A, Kim J, Sirotich E, Wang Y, Pullenayegum E. Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review. BMC Medical Research Methodology 2017, 17: 133. PMID: 28877680, PMCID: PMC5588621, DOI: 10.1186/s12874-017-0418-1.Peer-Reviewed Original ResearchConceptsUsual careVisit timeSystematic reviewLongitudinal studyCare risksPart of patientsOutcomes of interestTotal followEmbase databasesNumber of visitsEligible articlesLack of needLack of awarenessPatientsImportant predictorVisitsLack of useCareLower proportionRiskPredictorsReviewMEDLINEFollowStudy